# 散点图
import matplotlib.pyplot as plt
import numpy as np

n = 1024
x = np.random.normal(0, 1, n) # 均值为0，方差为1
y = np.random.normal(0, 1, n)
T = np.arctan2(y, x) # for color value
# plt.scatter(x, y, c=T, s=75, alpha=0.5) # s是size, c是color
plt.scatter(np.arange(5), np.arange(5))
# plt.xlim((-1.5, 1.5))
# plt.ylim((-1.5, 1.5))
plt.xticks(()) # 隐藏所有的ticks
plt.show()